TSX falls as AI spending worries hit tech and materials stocks
* TSX ends down 1.2% at 29,906.55
* Posts its lowest closing level since November 6
* Materials group falls 4.5% as copper prices decline
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* TSX ends down 1.2% at 29,906.55
* Posts its lowest closing level since November 6
* Materials group falls 4.5% as copper prices decline
